Abstract: A method and apparatus for building a workpiece of a desired geometry by deposit welding with a reusable preform. The reusable preform forms, supports, and cools the deposited molten weld material puddle while the weld material is solidifying thereby eliminating the need for a conventional preform. The reusable preform may be mobile or stationary in any shape, e.g., a block, a cylinder, or a belt. It is manufactured from either a combination of or exclusively of, a ceramic material or a material with high thermal conductivity.
Type:
Grant
Filed:
June 20, 1988
Date of Patent:
June 27, 1989
Assignee:
The Babock & Wilcox Company
Inventors:
Thomas E. Doyle, David P. Edmonds, Michael D. McAninch, Patrick M. Ryan
Abstract: This invention relates to a group of modular heat exchangers of the type having a steam chamber, a feedwater chamber, and a feedwater tube passing through the steam chamber to establish fluid communication with the feed chamber.
Type:
Grant
Filed:
August 24, 1978
Date of Patent:
September 15, 1981
Assignee:
The Babock & Wilcox Company
Inventors:
Felix S. Jabsen, Donald C. Schluderberg, Arnold E. Paulson